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Amanda [17]
3 years ago
8

A student wishes to compare the cost of textbooks from two sellers. The same forty textbooks are priced at both seller A and sel

ler B. Specifically, the student is determining whether at the 0.01 significance level there is sufficient evidence that the mean textbook cost from seller A is lower than the mean cost of textbooks from seller B. A computer is used and it is found that the P-value = 0.005. Which of the following statements is true?
A. This is a test regarding two dependent samples. There is sufficient evidence to conclude that the mean price of textbooks is lower at seller A.
B. This is a test regarding two dependent samples. There is insufficient evidence to conclude that the mean price of textbooks is lower at seller A.
C. This is a test regarding two independent samples. There is sufficient evidence to conclude that the mean price of textbooks is lower at seller A.
D. This is a test regarding two independent samples. There is insufficient evidence to conclude that the mean price of textbooks is lower at seller A.
Mathematics
1 answer:
MrRissso [65]3 years ago
6 0
Would it like.. not be C?? Im guessing its C (:
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Can someone help with problems fivethroughseven
frutty [35]

Answer:

5) 15120

6) 11880

7) 336

Step-by-step explanation:

The formula for permutation where mPn is m!/(m-n)!

Applying this to question 5, we get 9!/4!, which is 15120.

For question 6, we get 12!/8!, which is 11880.

For question 7, we get 8!/5!, which is 336.

5 0
2 years ago
Find the value of x.
Dmitrij [34]

Answer:

x=18

Step-by-step explanation:

So (3x+20)° and (5x-16)° are angles that are vertically opposite to each other; which means that they are equal to one another. Which means we can say:

(3x+20)=(5x-16)

20+16=5x-3x

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8 0
3 years ago
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Savatey [412]
The answer will be 4.9. =) 

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We simply multiply 490 by 0.01. =)
5 0
2 years ago
Read 2 more answers
Let a and b be non-zero integers. Which of the following is always true about the ratio ?
mezya [45]

C. It is always a rational number. You cannot determine its sign without knowing the values of a and b.

8 0
3 years ago
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Amy and Stephanie were playing a number game. Amy picked a number and told Stephanie that if she added 9 to the number and multi
mrs_skeptik [129]

Answer:

A. 2(x + 9) = 8

Step-by-step explanation:

To solve this problem, we proceed as follows:

- We call "x" the number picked up by Amy:

x

- Amy then adds 9 to this number, so we get:

x+9

- Then, we multiply this sum by 2, so we get:

2(x+9)

- Finally, Amy says that this number is equal to 8:

2(x+9)=8

So the correct equation is

A. 2(x + 9) = 8

We can even solve it to find the number. We get:

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5 0
3 years ago
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